PURPOSE: Functional shoes are provided to be installed with wheels movable in all directions and to have an excellent use due to easy manufacturability and convenient usability. CONSTITUTION: Each of functional shoes includes a shoe unit(100) having a sole(110) formed with an accommodation groove and a wheel mounting unit(20) detachable to the accommodation groove. The wheel mounting unit has one part exposed to the lower side of the wheel mounting unit and the rest accommodated in the inside of the wheel mounting unit, thereby being capable of comprising a ball type wheel(22) rotating in all directions. The wheel mounting unit has a disk shape and formed with a screw thread on the outside, thereby screw-coupled to the accommodation groove.
